Dark Boot Brown vs Raw Umber

How close are they?

ΔE 7.2, close: similar, with a visible difference side by side. Raw Umber is a little darker, more muted than Dark Boot Brown.

Can I use Raw Umber instead of Dark Boot Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Raw Umber is a little darker, more muted than Dark Boot Brown.

Can I use Dark Boot Brown instead of Raw Umber?

The same difference applies the other way round: Dark Boot Brown is a little lighter, more saturated.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.